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2395 Posts Member #: 229 Gavin@minispares.com kent |
2nd Aug, 2005 at 10:49:45pm
just wondering if its worth opening up the inlet/exhaust manifolds as the head seems to be enlarged slightly do the benefits outweigh the disadvantages if there are any? |
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 265 Posts Member #: 368 Senior Member Roseville, CA (USA) |
3rd Aug, 2005 at 12:03:25am
Gav, from what I've seen Keith Calver say, having a smaller opening on the head inlet port than on the inlet manifold output side gives a "step" that air gets over. This, though not good for flow, is good for horsepower. I think that it causes more tumble in the air/fuel mix. So you might want to give that a try. As for matching on the exhaust (you'd want them matched, not stepped), that is a good idea due to low-pressure eddies creating a virtual restriction if there is a mis-match. **************************************
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 4641 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
3rd Aug, 2005 at 02:56:52pm
It's definatley worth matching the exhaust manifold to the head. As you can see on the picture below the manifold has been sitting inside the port on the head, this is obvious due to the carbon build up on the manifold face. I matched the manifold to the gasket, as the head had been ported in this manner.
Edited by Turbo Phil on 3rd Aug, 2005. |
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2395 Posts Member #: 229 Gavin@minispares.com kent |
3rd Aug, 2005 at 11:13:38pm
cheers guys |
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Site Admin  9408 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
4th Aug, 2005 at 09:37:33am
phil what gasket is that? do the last long? On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? one extra month free for all Turbo minis members, PM me for detials |
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4641 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
4th Aug, 2005 at 06:03:10pm
It's an all metal type, & yes they're bloody good. Last time i saw a guy selling them i bought 10 while he had them. lol |
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